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A123647 as a simple table

na(n)
11
22
35
412
522
642
780
8136
9233
10396
11636
121020
131622
142496
153822
165808
178642
1812786
1918788
2027208
2139184
2256088
2379432
24111912
25156823
26217964
27301517
28415104
29567758
30773244
311048616
321414432
331900524
342543940
353389792
364501164
375956430

[1,2,5,12,22,42,80,136,233,396,636,1020,1622,2496,
 3822,5808,8642,12786,18788,27208,39184,56088,
 79432,111912,156823,217964,301517,415104,567758,
 773244,1048616,1414432,1900524,2543940,3389792,
 4501164,5956430]